An Efficient Phase and Object Estimation Scheme for Phase-Diversity Time Series Data

We present a two-stage method for obtaining both phase and object estimates from phase-diversity time series data. In the first stage, the phases are estimated for each time frame using the limited memory BFGS method. In the second stage, an algorithm that incorporates a nonnegativity constraint as well as prior knowledge of data noise statistics is used to obtain an estimate of the object being observed. The approach is tested on real phase-diversity data with 32 time frames, and a comparison is made between it and a previously developed approach. Also, the image deblurring algorithm in stage two is tested against other standard methods and is shown to be the best for our problem.

• Type: Journal
• Year: 2008
• Where: TIP
• Authors: Johnathan M. Bardsley
• Keywords: Limited Memory Bfgs, Time Frames, TIP 2008, Two-stage Method